What is a DC Generator? A dc generator is an electrical instrument that transforms mechanical energy into electricity. This energy conversion is based on the dynamically induced emf production principle. In electricity generation, a generator is a device that converts motive power (mechanical energy) into electrical power for use in an external ci

INDUCTION MOTOR   INDUCTION MOTOR CONSTRUCTION   An induction motor has the same physical stator as a synchronous machine, with a different rotor construction. It looks (and is) the same as a synchronous machine stator. There are two different types of induction motor rotors which can be placed inside the stator. One is called a cage

ELECTRICAL REACTOR   What are electrical reactors?    A reactor is a coil which has a large number of turns and whose ohmic resistance value is much greater. Reactors are used to limit the short circuit currents which can cause damage to the equipment of the power system. The additional reactance added in series with the system

What is a Voltmeter? Voltmeter is an electrical measurement device used to measure a potential difference between two scales. A voltmeter is a device used to measure the electrical potential difference between two points in an electrical circuit. Analog voltmeters shift the pointer over a scale in accordance to the voltage of the circuit; digital

RELAY What is a relay? Relays are switches designed to close and open circuits electronically as well as electromechanically. It controls the opening and closing of the electronic circuit contacts. When the relay contact (NO) is opened, the relay is not energized by the open contact. However, if the relay is closed (NC), it is not energized due t

Alternator What is Alternator? An alternator is basically a machine that converts mechanical energy into electrical energy. Mechanical energy is provided by the prime movers. Prime Movers could be an engine, a turbine or a hydro-pressure system etc. An alternator is an electrical generator that transforms mechanical energy into electrical energy

Transformer Losses What are transformer losses? Transformer losses are caused by an electrical current flowing in the coils and by the alternating magnetic field in the core. Losses associated with the coils are called load losses, while losses caused in the core are called no-load loss. In any electrical system, 'loss' can be described as the di

Transmission Line Losses in Pakistan   What is a Transmission Line? A transmission line is used for the transmission of electrical power from generating substation to the various distribution units. It transmits the wave of voltage and current from one end to another. The transmission line is made up of a conductor having a uniform cross-se

Solar Panel Introduction to Solar Panel The term solar panel is used colloquially for a photovoltaic board. The PV module is an assembly of photovoltaic cells mounted in the installation framework. Photovoltaic cells use sunlight as a source of energy to produce direct electricity. A set of PV modules is called a PV panel and a panel system is ca

What is a Steam Turbine Power Plant? A steam power plant is a power plant in which water is heated, turns into steam and spins a steam turbine which drives an electrical generator to produce electricity. A steam turbine is a device that extracts thermal energy from pressurized steam and uses it to do mechanical w